<div class="error-404">
    <div class="error-content">
        <h1>Sorry!</h1>
        <h2>系统数据正在完善中!</h2>
        <button ng-click="back()">返回</button>
        <!--<button onclick="javascript: history.go(-1);">返回</button>-->
        <button ui-sref="home.main">首页</button>
    </div>
</div>